The Light of Despair

From the Introduction

The Light of Despair is a short adventure for four 5th-level characters. The adventure takes the characters from the high plateau of a semi-seaside community down a steep cliff and to a haunted lighthouse long disused. It is an acceptable challenge for characters of levels 4-6. It is not adaptable to lower-level characters due to the creatures involved, and higher-level characters would find it far too easy. It uses the Lighthouse map from the January 2001 Map-a-Week feature.